Tallán language

Tallán is an extinct and poorly attested language of the Piura Region of Peru. It is too poorly known to be definitively classified. It may have a possible connection to neighboring Sechura, termed the Sechura–Catacao languages. In Glottolog and in Jolkesky, the two attested Catacaoan languages, Catacao and Colán, are listed as dialects of Tallán.

Dialects

lists Apichiquí, Cancebí, Charapoto, Pichote, Pichoasac, Pichunsi, Manabí, Jarahusa, and Jipijapa as dialects of Atalán. Rivet lists Manta, Huancavilca, Puna, and Tumbez within an Atalán family.
Loukotka makes reference both to Tallán and the Catacaoan language family, treating Tallán as related to Sechura but Catacaoan as a distinct family. He lists the following three languages:

Catacao or Katakao, once spoken around the city of Catacaos
Colán or Kolán, once spoken between the Piura River and Chira RiverChira or Lachira or Tangarará, once spoken along the Chira River. It is unattested.
Terrence Kaufman includes the Leco language in the Catacaoan group.

Catacao and Colán are frequently subsumed into the extinct Tallán language as dialects, thus making the Catacaoan family synonymous with Tallán. Loukota compares Catacaoan to the Culle language and the Sechura language but distinguishes them from all other families.